ICALEPCS2011 - List of Authors (Johnson, A.N.)

Paper

Title

Page

Adding Flexible Subscription Options to EPICS

827

R. Lange
HZB, Berlin, Germany
L.R. Dalesio
BNL, Upton, Long Island, New York, USA
A.N. Johnson
ANL, Argonne, USA

Funding: Work supported by U.S. Department of Energy (under contracts DE-AC02-06CH11357 resp. DE-AC02-98CH10886), German Bundesministerium für Bildung und Forschung and Land Berlin.
The need for a mechanism to control and filter subscriptions to control system variables by the client was described in a paper at the ICALEPCS2009 conference.[1] The implementation follows a plug-in design that allows the insertion of plug-in instances into the event stream on the server side. The client can instantiate and configure these plug-ins when opening a subscription, by adding field modifiers to the channel name using JSON notation.[2] This paper describes the design and implementation of a modular server-side plug-in framework for Channel Access, and shows examples for plug-ins as well as their use within an EPICS control system.
[1] R. Lange, A. Johnson, L. Dalesio: Advanced Monitor/Subscription Mechanisms for EPICS, THP090, ICALEPCS2009, Kobe, Japan.
[2] A. Johnson, R. Lange: Evolutionary Plans for EPICS Version 3, WEA003, ICALEPCS2009, Kobe, Japan.

Poster WEPKS020 [0.996 MB]

Paper	Title	Page
WEPKS020	Adding Flexible Subscription Options to EPICS	827
	R. Lange HZB, Berlin, Germany L.R. Dalesio BNL, Upton, Long Island, New York, USA A.N. Johnson ANL, Argonne, USA
	Funding: Work supported by U.S. Department of Energy (under contracts DE-AC02-06CH11357 resp. DE-AC02-98CH10886), German Bundesministerium für Bildung und Forschung and Land Berlin. The need for a mechanism to control and filter subscriptions to control system variables by the client was described in a paper at the ICALEPCS2009 conference.[1] The implementation follows a plug-in design that allows the insertion of plug-in instances into the event stream on the server side. The client can instantiate and configure these plug-ins when opening a subscription, by adding field modifiers to the channel name using JSON notation.[2] This paper describes the design and implementation of a modular server-side plug-in framework for Channel Access, and shows examples for plug-ins as well as their use within an EPICS control system. [1] R. Lange, A. Johnson, L. Dalesio: Advanced Monitor/Subscription Mechanisms for EPICS, THP090, ICALEPCS2009, Kobe, Japan. [2] A. Johnson, R. Lange: Evolutionary Plans for EPICS Version 3, WEA003, ICALEPCS2009, Kobe, Japan.
	Poster WEPKS020 [0.996 MB]