Experimental Physics and Industrial Control System
Hi Renato,
That is correct, I would class this as "experiments in how you might do this" rather than "the official way to do this".
Thanks,
Tom
> -----Original Message-----
> From: renato sanhueza <[email protected]>
> Sent: 08 April 2018 04:47
> To: Cobb, Tom (DLSLtd,RAL,TEC) <[email protected]>
> Cc: [email protected]
> Subject: Re: question about pvAccess monitor
>
> Hi Tom,
>
>
> Your implementation of dynamic RPC using EPICS is very impressive.
> Nonetheless, if I understand correctly, it is not part of the "official" version of
> EPICS which I am studying right now.
>
>
> Thanks for sharing this information,
>
> Renato
>
>
> On Thu, Apr 5, 2018 at 9:45 AM, [email protected]
> <mailto:[email protected]> <[email protected]
> <mailto:[email protected]> > wrote:
>
>
> > 2. Can I use this introspection interface to retrieve the name of a
> > service and its parameter list to compose a RPC during runtime by
> following
> > Marty's approach?
> >
> > I suspect that the answer for pvAccess itself is no.
> >
> > But even if the answer is no a channelRPC service can implement
> it's own
> > query service that describes itself.
> > But it must describe itself via pvData.
>
> That is the approach that Diamond has taken in its continuous
> scanning middleware:
>
> http://pymalcolm.readthedocs.io/en/latest/reference/structure.ht
> ml <http://pymalcolm.readthedocs.io/en/latest/reference/structure.html>
>
> We define a Block to be a container for a number of Methods and
> Attributes. Attributes are represented by NTScalars, NTScalarArrays and
> NTTables, but with their metadata abstracted to separate Meta objects.
> These same Meta objects are used to describe the arguments that a Method
> should be passed when doing an RPC on it, and the structure it will return.
> We implement this in Python, exposing the structures either over pvAccess
> (currently with a Diamond specific fork of an old version of pvaPy, but we are
> working on this) or as JSON over websockets.
>
> Thanks,
> Tom
>
>
> --
> This e-mail and any attachments may contain confidential, copyright
> and or privileged material, and are for the use of the intended addressee
> only. If you are not the intended addressee or an authorised recipient of the
> addressee please notify us of receipt by returning the e-mail and do not use,
> copy, retain, distribute or disclose the information in or attached to the e-
> mail.
> Any opinions expressed within this e-mail are those of the individual
> and not necessarily of Diamond Light Source Ltd.
> Diamond Light Source Ltd. cannot guarantee that this e-mail or any
> attachments are free from viruses and we cannot accept liability for any
> damage which you may sustain as a result of software viruses which may be
> transmitted in or with the message.
> Diamond Light Source Limited (company no. 4375679). Registered in
> England and Wales with its registered office at Diamond House, Harwell
> Science and Innovation Campus, Didcot, Oxfordshire, OX11 0DE, United
> Kingdom
>
>
>
>
>
> --
>
> Renato Sanhueza Ulsen
> Ing Civil Informática.
--
This e-mail and any attachments may contain confidential, copyright and or privileged material, and are for the use of the intended addressee only. If you are not the intended addressee or an authorised recipient of the addressee please notify us of receipt by returning the e-mail and do not use, copy, retain, distribute or disclose the information in or attached to the e-mail.
Any opinions expressed within this e-mail are those of the individual and not necessarily of Diamond Light Source Ltd.
Diamond Light Source Ltd. cannot guarantee that this e-mail or any attachments are free from viruses and we cannot accept liability for any damage which you may sustain as a result of software viruses which may be transmitted in or with the message.
Diamond Light Source Limited (company no. 4375679). Registered in England and Wales with its registered office at Diamond House, Harwell Science and Innovation Campus, Didcot, Oxfordshire, OX11 0DE, United Kingdom
- Replies:
- Re: question about pvAccess monitor Andrew Johnson
- References:
- question about pvAccess monitor renato sanhueza
- Re: question about pvAccess monitor Johnson, Andrew N.
- Re: question about pvAccess monitor Mark Rivers
- Re: question about pvAccess monitor Johnson, Andrew N.
- Re: question about pvAccess monitor renato sanhueza
- Re: question about pvAccess monitor Marty Kraimer
- Re: question about pvAccess monitor renato sanhueza
- Re: question about pvAccess monitor Hartman, Steven M.
- Re: question about pvAccess monitor Kasemir, Kay
- Re: question about pvAccess monitor renato sanhueza
- Re: question about pvAccess monitor Marty Kraimer
- RE: question about pvAccess monitor [email protected]
- Re: question about pvAccess monitor renato sanhueza
- Navigate by Date:
- Prev:
RE: Problem with autosave module making it crash at random basis. Abdalla Ahmad
- Next:
GpibBoardDriverConfig not found Vishnu Patel
- Index:
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
<2018>
2019
2020
2021
2022
2023
2024
- Navigate by Thread:
- Prev:
Re: question about pvAccess monitor renato sanhueza
- Next:
Re: question about pvAccess monitor Andrew Johnson
- Index:
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
<2018>
2019
2020
2021
2022
2023
2024