Robust Computer Systems Permitting Autonomously Switching BetweenAlternative/Redundant Components

摘要

A computer system having first, second, third and alternate computers forgenerating a graphical user interface (GUI) on the first computer screen corresponding to a presentation generated with respect to the second computer screen irrespective of the operating system differences between the respective first, second and third computers, includes: a first device for providing a hypertext markup language (HTML) document including an applet tag corresponding to a Universal Client device to the first computer; a second device for initializing and executing the Universal Client device using a JAVA(TM) virtual machine associated with the first computer; a third device for parsing and interpreting a script associated with the Universal Client device to thereby cause the Universal Client device to display the GUI; a fourth device disposed in the second computer for generating a heartbeat signal; a fifth device disposed in the first computer for receiving the heartbeat signals; a sixth device for parsing and interpreting the script associated with the Universal Client device to thereby cause the Universal Client device to establish a predetermined connection between the first and the second computers; a seventh device for parsing and interpreting the script associated with the Universal Client device to thereby cause the Universal Client device to establish a predetermined connection between the first and the alternate computers; and an eighth device disposed in one of the second and third computers for generating a string causing changes in the GUI displayed by the Universal Client device on the first computer.