Basic HTML version of Foils prepared March 4 1998

Foil 69 Execution Model for Event processing

From VRML 2 Basic Concepts and Definitions CPS616 -- Information Track of CPS -- Spring Semester 98. by Zeynep Ozdemir, Rob Baker, Meryem Ispirli, Geoffrey C. Fox
Definition and Example of Execution Model for Foil 69(Definition and Example)
Once a sensor or Script has generated an initial event, the event is propagated from the eventOut producing the event along any ROUTEs to other nodes.
  • These other nodes may respond by generating additional events, continuing until all routes have been honored. This process is called an event cascade.
  • All events generated during a given event cascade are assigned the same timestamp as the initial event, since all are considered to happen instantaneously.
Some sensors generate multiple events simultaneously. In these cases, each event generated initiates a different event cascade with identical timestamps.

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