Experimental Physics and
Industrial Control System

"Kasemir, Kay" <[email protected]> · Tue, 15 Apr 2014 12:15:18 -0400

Hi:

Creating PVs inside BOY scripts is problematic.

The intended use case for BOY, being a display tool, is:
Select widget, enter PV name, done.
-> BOY connects to the PVs, widget handles received values.

Maybe change the widget defaults to not be alarm sensitive etc.

In rare cases, you can use scripts to do things which would have been impossible with for example MEDM, EDM:
Select widget, enter PV name, add script, configure input/output PVs for the script, done.
-> BOY connects to the PVs, sends received values to script, you handle the values in the script, maybe updating widget properties in response.

If you _create_ PVs within the script, you run into many pitfalls related to the connection handling, the PV cleanup, or what you experience now, which is the complete update of how PVs are handled inside CSS between versions 3.1 and 3.2.
 From 3.2 on, org.csstudio.utility.pv has been replaced with the PVManager, http://pvmanager.sourceforge.net

So now you would have to start your script like this:

use  "org.epics.pvmanager.."
… and then read the PVManager examples of how to use it.

Sorry,
Kay

On Apr 15, 2014, at 11:40 AM, Hovanes Egiyan <[email protected]> wrote:

> Hi,
> 
> we have a quite large number of BOY OPI-s that use Jython scripts. These 
> Jython scripts
> use  "org.csstudio.utility.pv", namely PVFactory,  so they contain the 
> following line:
> 
> from org.csstudio.utility.pv import PVFactory
> 
> Until now we have been using basic EPICS CSS 3.1.7 build from SNS , and 
> now we would
> like to use the recent version 3.2.16. But what happens now with that 
> version is that Jython fails
> to find the "org.csstudio.utility.pv" on the line shown above. That 
> plugin is incuded in the plugin
> directory, and when I explicitly append the jar-file  to the sys.path, 
> then the scripts work.
> At this time I do not want to go into each script file and add a line to 
> append the jar
> file. Instead, I was wandering if I can recompile EPICS CSS from SNS 
> source in such a way that I do
> not need to specify the "org.csstudio.utility.pv" path myself in the 
> scripts. Just getting the source for 3.2.26
> and making the "org.csstudio.basic.epics.product" produces the same 
> result. Is there something
> simple that I need to change in Eclipse when building the product to 
> have that jar-file included in the list
> when Jython loads?
> 
> Thanks,
>    Hovanes Egiyan.
> 

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System