Experimental Physics and
Industrial Control System

Michael Davidsaver via Tech-talk <tech-talk at aps.anl.gov> · Tue, 13 Jul 2021 07:38:01 -0700

On 7/13/21 7:10 AM, Pogacnik, Matic via Tech-talk wrote:
> Hi all,
> 
> We are working on the P4P gateway to add the ability to reload the ASG/PVLIST 
> configurations. We were successful in applying the new configuration to the 
> new connections (draft PR: https://github.com/mdavidsaver/p4p/pull/70), 
> but we have problems applying new rules to the existing connections (monitors). 
> Can someone familiar with the codebase provide any tips, please?

> I would 
> especially like to know where the list of the existing connections is stored 
> and all the metadata (hosts/username/aliases) used to open and validate 
> these connections.

I didn't see this specific question on the PR.  The channel list is being kept
down in the AS machinery in the 'Engine._anodes' dict.

https://github.com/mdavidsaver/p4p/blob/bf8d637d7edc9dde7c2acbacbbb6c73d8f194e6b/src/p4p/asLib/__init__.py#L49

This is how permissions changes resulting from CALC rules are handled.

https://github.com/mdavidsaver/p4p/blob/bf8d637d7edc9dde7c2acbacbbb6c73d8f194e6b/src/p4p/asLib/__init__.py#L201

Also, while I don't think there will be any substantial conflicts,
I would suggest seeing how your changes apply on top of:

https://github.com/mdavidsaver/p4p/pull/54

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System