1. Real Time Auction System Metex Systems Inc.

2. Inside the UML The Problem Auctioning in real time over the Web requires that many people connect and participate simultaneously Real-time Web applications that require human control interaction also require remote interfaces for controlling the software

3. Inside the UML The Requirements Completely distributable system Real-time synchronization of all components Scalability of the system

4. Inside the UML The Solution Apply the Publish Subscribe (or Observer GHJV94) Pattern to the system Create components that are independent of each other but which blindly output the appropriate data Transmit this data as messages through the Publish Subscribe mechanism

5. Inside the UML Rational Rose Model Check out the Real Time Auction Rose model titled auction.mdl on this CD For more information visit the Metex web site – www.metex.com Gamma, E., Helm, R., Johnson, R., and Vlissides, J.. Design Patterns: Elements of Reusable Object-Oriented Software. 1995, Addison Wesley.