1. Airline Reservation System Vishnu Pendyala Wireless Clients and the advent of Open Net Environment (Sun One) Software Architecture (c) 2001 Vishnu S. Pendyala

2. 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. (c) 2001 Vishnu S. Pendyala

3. 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 competitor’s strategy, accesses company’s ERP system, and logs the order in CRM system. (c) 2001 Vishnu S. Pendyala

4. 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. (c) 2001 Vishnu S. Pendyala

5. Enabling TechnologyThe Server Side • EJB components cater to the service logic, make calls to AAA server. • EJB’s 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. (c) 2001 Vishnu S. Pendyala

6. 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) (c) 2001 Vishnu S. Pendyala

7. Web Services Developer Model Source: http://www.Sun.com

8. Source: http://www.sun.com

9. 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. (c) 2001 Vishnu S. Pendyala

10. References • Enabling the wireless net effect, http://www.sun.com/sp/supplements/wireless_whitepaper.pdf • Sun[tm] Open Net Environment Technical White Paperhttp://www.sun.com/software/sunone/wp-arch/ • eMobile: A Sample End-to-End Application - Part 2, http://java.sun.com/j2ee/white/eMobilePartII.pdf (c) 2001 Vishnu S. Pendyala