Experimental Physics and
Industrial Control System

Carsten Winkler <[email protected]> · Thu, 22 Aug 2013 12:28:04 +0200

Hi,

thank you very much for all help! Now I found the reason of my problem.
I instantiated a DBR_TIME_String before I created the CA context. If you
do that you are in trouble.
For all those interested here comes an extract of the error case and the
simple resolution.

public class CAJBugTest {
    public static void main(String[] args) throws Exception {
        String varName = "INFOCL:hd"; //record(stringout, "INFOCL:hd")
{field(DESC, "user support") field (PINI, "YES") }
        System.setProperty("CA_DISABLE_REPEATER", "TRUE"); // In this
case I don't want use any repeater

        // bad idea :(
        /*
        DBR_TIME_String dummy = new DBR_TIME_String(new String[]{"???"});
        dummy.setStatus(Status.UDF_ALARM);
        dummy.setSeverity(Severity.INVALID_ALARM);
        dummy.setTimeStamp(new TimeStamp());
        */

        Context ctxt
=JCALibrary.getInstance().createContext(JCALibrary.CHANNEL_ACCESS_JAVA);

        // right place :)
        DBR_TIME_String dummy = new DBR_TIME_String(new String[]{"???"});
        dummy.setStatus(Status.UDF_ALARM);
        dummy.setSeverity(Severity.INVALID_ALARM);
        dummy.setTimeStamp(new TimeStamp());

        Channel ch = ctxt.createChannel(varName, new ConnectionListener() {
            @Override
            public void connectionChanged(ConnectionEvent ev) {
                CAJChannel channel = (CAJChannel) ev.getSource();
                try {
                    System.out.println("event of " + channel.getName()
+ " with data type " +
((channel.getFieldType()!=null)?channel.getFieldType().getName():"UNKNOWN")
+ " has state " + channel.getConnectionState().getName());
                } catch(Exception e) {
                    e.printStackTrace();
                }
            }
        });
        ctxt.flushIO();
        Thread.sleep(3000);
        ch.destroy();
        ctxt.destroy();
    }
}

Cheers,
Carsten

________________________________

Helmholtz-Zentrum Berlin für Materialien und Energie GmbH

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Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System