Experimental Physics and
Industrial Control System

Matthias Clausen <[email protected]> · Tue, 24 Mar 2009 19:00:05 +0100

Dalesio, Leo wrote:

3. I don't know that the maintainers of EPICS fully endorse CAJ.  I
   think it would be great if they did, but there may be some feeling
   that the CA protocol should only be implemented as provided in EPICS
   base, and any other language support should be implemented with
   bindings into the native CA library rather than a separate
   implementing of the CA protocol in that other language.

---- BNL not only endorses this version, we plan to put funding into it to develop it to support the Java IOC. This work is also being supported by the SBIR grant that is funding the Java IOC.

The default CA impementation for the Java-IOC as well as CSS is CAJ. For

CSS there's still the option to use JNI.

At DESY we run both (CSS and Java-IOC with CAJ.

4. Cosylab has developed CAJ.  What happens if Cosylab no longer
   supports CAJ?  Who will maintain it?  Similarly, what happens if the
   CA protocol is heavily changed, say in EPICS 3.15 - who will do the
   work to update CAJ to support the changes to the CA protocol?
----- This is open source. The NSLS II project also expects to have someone delve into this code so that there are at least two authors that understand and can support the code.

We - as the EPICS community - should coordinate the maintenance effort

for CAJ, the Java CA server and possibly other software packages written

by companies like Cosylab( VDCT).

E.g. we have agreed on procedures with Cosylab how changes are going to

be implemented in this code. We will probably need the same kind of

agreements for other code. Maybe this issue can be discussed during the

EPICS meeting (which I will not be able to attend).

This reminds me on the status of the Java CA server implementation. Is

this now available as open source?

-Matthias

Bob

--
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Matthias Clausen                         Cryogenic Controls Group(MKS-2)
phone:  +49-40-8998-3256                Deutsches Elektronen Synchrotron
fax:    +49-40-8994-3256                                    Notkestr. 85
e-mail: [email protected]                           22607 Hamburg
WWW-MKS2.desy.de                                                 Germany
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Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System