How to get web application to use Tuscany without conflicting with SAP SDO

Question

Hi,
We are attempting to run a web application on SAP NetWeaver CE 7.1 SP1 which uses Tuscany SDO.  As it now stands We must use Tuscany because the web application will not run with the SAP SDO implementation provided by Netweaver. To ensure that Tuscany is loaded with priority, we have packaged the Tuscany JAR files and their dependencies as a heavy resource, as described here:
http://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/60642a88-95fe-2b10-d387-a245d48fc257?overridelayout=true
The final check showed that Tuscany was correctly deployed as a heavy resource and included the following JAR files:
common-2.2.3.jar
ecore-2.2.3.jar
ecore-change-2.2.3.jar
ecore-xmi-2.2.3.jar
tuscany-sdo-impl-1.1.1.jar
tuscany-sdo-lib-1.1.1.jar
tuscany-sdo-tools-1.1.1.jar
xsd-2.2.3.jar
We also verified that the web application using Tuscany has a hard reference to the Tuscany heavy resource.
However, when we try to run the web application, the following error is logged:  java.lang.LinkageError: Class commonj/sdo/DataGraph violates loader constraints
The issue is definitely due to some kind of classloading conflict with the SAP SDO library, as the application runs normally when SAP SDO is manually removed from the classpath. Doing this on a production system is unfortunately not an option, though.
So the question is: how to get web application to use Tuscany without conflicting with SAP SDO?

Answer 1

I took a look at the "printerReady" example.  Looks like I may be able to use the InetPing (...) function to ping through a range of IP addresses looking for a response.
Any ideas on how to find the MAC address associated with the IP addresses that respond?
We may have multiple units responding and the MAC address will allow the operator to determing which unit to connect to.
I'll try the InetPing to see how it works,
Kirk