You can use the dynamic classloading service, by having the correct security policy on the client side, this works.
But I believe you would have to "download" the classes with different classloaders, because you still need to "isolate" the classes on the client side, too. Maybe you'll have a problem with the remoting infrastructure, because this is possibly different from version to version.
Ok, great. Do you have a code snippet how to talk to the service and to download class bytecode? Is there an example in the testsuite? Thanks!