ClassCastException under 7.2

Question

I'm porting an application that works under LCRE 7.0.2 to LCRE 7.2 and I've started getting ClassCastExceptions from the last line in the following code:
// Lookup the PDF Manipulation service
Object pdfObject = namingContext.lookup("PDFManipulation");
pdfConnectionFactory = (ConnectionFactory) PortableRemoteObject.narrow(pdfObject, ConnectionFactory.class);
The code is straight out of the documentation. What's strange is that I've already successfully retrieved a connection to the DataManagerService a few lines before.
Has anyone else encountered this before? I basically re-built the project from scratch copying over my old java source files to the new project and then copied in the new .jar files from 7.2.
The only thing that strikes me as odd is that under 7.0.2 I had to refer to DocumentServicesLibrary.jar as an external file (since, under 7.0.2 it was copied into JBoss's lib directory) and under 7.2 I'm including it in the .war (per the LC Forms documentation, the LC RE docs don't say much about DocumentServicesLibrary.jar). This library is the one that contains the ConnectionFactory class that the narrow() call is unable to cast to. Perhaps it's a coincidence, but I'm thinking that it's related.
Should the DocumentServicesLibrary really be included in my .war file or should it be excluded as it was under 7.2? I've tried it both ways but neither works.
Regards,
Rob McDougall
4 Point Solutions

Answer 1

Hi Chris,
That did the trick. Thanks!
The knowledgebase article should probably be amended to mention Reader Extensions (I hadn't installed Document Security, yet I still encountered the problem). It would also be nice if it gave the exact exception that is generated (a ClassCastException). I had searched the knowledgebase for both ClassCastException and Exception although I limited my search to Reader Extensions, so I didn't end up finding that article.
Thanks again for pointing it out.
Regards,
Rob