Encyclopedia of Database Systems

2018 Edition
| Editors: Ling Liu, M. Tamer Özsu

Event Processing Agent

  • Opher Etzion
Reference work entry
DOI: https://doi.org/10.1007/978-1-4614-8265-9_587

Synonyms

Event processing component; Event processing mediator

Definition

A software module and a node in the event processing network that process events [2].

Key Points

An event processing agent [ 3] is a node in the event processing network that receives one or more events as input, processes them, and creates one or more events as output. There are various types of event processing agents [ 4]:
  1. 1.

    Filter agent: receives a single event and decides based on a predicate expression whether to route this event further or not (in this case it is a terminal node for this specific event instance).

     
  2. 2.

    Validation agent: receives a single event and a predicate expression that serves as an integrity constraint for this event. If the integrity constraint is violated may act as a filter (reject the event), may transform the event, or may orchestrate additional actions in an event sink.

     
  3. 3.

    Transformation agent: receives a single event and transforms this event to another event format.

     
  4. 4.

    Split...

This is a preview of subscription content, log in to check access.

Recommended Reading

  1. 1.
    Luckham D. The power of events. Boston: Addison-Wesley; 2002.Google Scholar
  2. 2.
    Luckham D, Schulte R. editors. EPTS event processing glossary version 1.1. http://complexevents.com/?p=409
  3. 3.
    Loke SW, Padovitz A, Zaslavsky A. Context-based addressing: the concept and an implementation for large-scale mobile agent systems using publish-subscribe event notification. In: Proceedings of the 4th International Conference on Distributed Applications and Interoperable Systems; 2003. p. 274–84.CrossRefGoogle Scholar
  4. 4.
    Sharon G, Etzion O. Event processing network: model and implementation. IBM Syst J. 2008;47(2):321–34.CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.IBM Software GroupIBM Haifa Labs, Haifa University CampusHaifaIsrael

Section editors and affiliations

  • Opher Etzion
    • 1
  1. 1.IBM Software GroupIBM Haifa Labs, Haifa University CampusHaifaIsrael