Experimental Physics and
Industrial Control System

Mark Rivers <[email protected]> · Fri, 14 Jun 2013 18:30:03 +0000

In recent versions of JCA you can do the following:

            System.setProperty("jca.use_env", "true");
             // Get the JCALibrary instance.
             jca = JCALibrary.getInstance();
             ctxt = jca.createContext(JCALibrary.CHANNEL_ACCESS_JAVA);

By setting "jca.use_env" to "true" JCA will use the same environment variables as the C language Channel Access code.  I find this much easier than using the JCALibrary.properties, particularly because there can be multiple copies of that file in the Java search path, and finding them all can be a headache.  I have changed the EPICS areaDetector ImageJ plugin to use this mechanism.

Mark

-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Sinisa Veseli
Sent: Friday, June 14, 2013 12:58 PM
To: [email protected]
Subject: CAJ/JCA question

Hi,

Sorry if I am missing something obvious, but are there up to date 
examples and documentation on configuring and using CAJ and JCA?

I'm using he latest versions available on sourceforge: 2.3.6 for JCA and 
1.1.10 for CAJ.

I found a very old tutorial at 
http://www.aps.anl.gov/bcda/jca/jca/2.1.2/tutorial.html (which still 
seems to be relevant) and lots of more recent links (such as 
http://caj.cosylab.com/manual.html), that do not seem to work any longer.

After going through some old training slides, I found the line of code 
that allows me to use CAJContext for creating channels, but no matter 
what I use
for com.cosylab.epics.caj.CAJContext.addr_list and auto_addr_list in 
JCALibrary.properties file, my channels (for which caget works just 
fine) are never connected.

Thanks for any help or hints,

Sinisa

-- 
Sinisa Veseli
Software Services Group
APS Engineering Support Division
Argonne National Laboratory
[email protected]
(630)252-9182

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System