File APIs for Java Developers
Manipulate DOC, XLS, PPT, PDF and many others from your application.
The moose likes Distributed Java and the fly likes CORBA - object reference valid? Big Moose Saloon
  Search | Java FAQ | Recent Topics | Flagged Topics | Hot Topics | Zero Replies
Register / Login
JavaRanch » Java Forums » Java » Distributed Java
Bookmark "CORBA - object reference valid?" Watch "CORBA - object reference valid?" New topic

CORBA - object reference valid?

Dan Murphy
Ranch Hand

Joined: Mar 29, 2005
Posts: 126

I'm writing a Java CORBA client, which uses the Visibroker ORB. I'm using the following code to check if a remote object reference is still valid:

I added the try-catch, because _non_existent() was throwing a NullPointerException. The evidence was provided by the following stack trace I found in my logs:

Caused by: java.lang.NullPointerException
at com.inprise.vbroker.orb.ORB.getThreadLocalObject(Unknown Source)
at com.inprise.vbroker.qos.PolicyHelper.get_client_policy(Unknown Source)
at com.inprise.vbroker.orb.DelegateImpl.get_policy(Unknown Source)
at org.omg.CORBA.portable.ObjectImpl._get_policy(
at com.inprise.vbroker.GIOP.ProtocolConnector.doServiceContext(Unknown Source)
at com.inprise.vbroker.GIOP.ProtocolConnector.doServiceContext(Unknown Source)
at com.inprise.vbroker.IIOP.ProtocolConnector.doServiceContext(Unknown Source)
at com.inprise.vbroker.GIOP.ProtocolConnector.request(Unknown Source)
at com.inprise.vbroker.GIOP.ProtocolConnector.pseudoRequest(Unknown Source)
at com.inprise.vbroker.GIOP.ProtocolConnector.non_existent(Unknown Source)
at com.inprise.vbroker.orb.DelegateImpl.non_existent(Unknown Source)
at org.omg.CORBA.portable.ObjectImpl._non_existent(
at com.acecomm.parentpatrol.surePay.SurePaySession.refreshSessionIfNecessary(

Anyway, my question is there a better way to check whether a remote object reference is still valid? Preferably, one which doesn't throw any runtime exceptions

Thanks in Advance,
[ January 18, 2007: Message edited by: Dan Murphy ]

I agree. Here's the link:
subject: CORBA - object reference valid?
It's not a secret anymore!