Experimental Physics and
Industrial Control System

"J. Lewis Muir" <[email protected]> · Thu, 29 Nov 2012 14:07:46 -0600

On 11/29/12 12:30 PM, Shankar, Murali wrote:
> 
> Just wanting to check if anyone uses CAJ (pure Java CA client) clients in production especially in combination with IOC's that are using the native CA library.
> I've pinged a few folks offline; however, it was thought that a community wide repoll would probably be beneficial.

Hi, Murali.

We use it in production with IOCs using the native CA library at
IMCA-CAT (Sector 17 at the APS).

I suspect NSLS-II uses it since they indicated a commitment to ensure it
is maintained back in March of 2009:

  http://www.aps.anl.gov/epics/tech-talk/2009/msg00544.php

> Known issues that I am already aware of (thanks Michael and Eric)
> 1) Interoperability issue with the CA Gateway and clients using monitors with DBE_PROPERTY.

It took almost three years, and I haven't tried using it, but the CAJ
Changes page shows version 1.1.10, released on 2012-06-14, with a
description of "DBE_PROPERTY support".  Is your problem that it seems
CAJ doesn't support the DBE_PROPERTY event type, or is it a problem
specific to using DBE_PROPERTY with the CA Gateway?

Do you know where the problem lies?  Have you filed a bug report with
either project?

Checking the CAJ web site, it seems there is no bug tracker set up for
CAJ; you have to send an email.  I think CAJ is big enough and used by
enough people that a bug tracker is warranted.  Matej, would you be up
for enabling a bug tracker for CAJ?

> 2) For CA Access Security, CAJ uses full hostnames (with domain) and libca uses short host names (without domain)

This sounds like a bug to me.  I would expect the two to behave
identically.  I don't know what the correct behavior is.  Maybe libca is
not behaving in accordance with the spec, or maybe the short hostname is
according to spec.  If the latter, and if Matej (the developer of CAJ)
does not want to change this behavior as the default, perhaps support
could be added for a compatibility-mode option/property to enable the
use of the short hostname in CAJ?

Lewis

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System