Experimental Physics and
Industrial Control System

My 2 cents:

I advise against setting this (or any) property from code.
This might surprise and/or frustrate users who *do* want
to use property files etc.

You can set 'jca.use_env' from a file or even on the command line

java -Djca.use_env=true

Cheers
- Till


On 06/14/2013 01:30 PM, Mark Rivers wrote:

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

Replies:

Re: CAJ/JCA question J. Lewis Muir

References:

CAJ/JCA question Sinisa Veseli

RE: CAJ/JCA question Mark Rivers

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