How to share an RPC RemoteServiceServlet between apps?

Hi,

I want to have a service used by several modules. I put the implementation servlet in a root web app, and connected to it, from the client side, by specifying the endpoint like this...

  ServiceDefTarget t = (ServiceDefTarget)service;
  t.setServiceEntryPoint("/commonService");

So "/commonService" is url path that maps to the servlet.  But when it connects I get errors on the server side:

  ERROR: The serialization policy file '/forums/discussions/7B344C69AD493C1EC707EC98FE148AA0.gwt.rpc' was not found; 
  did you forget to include it in this deployment?

So it appears that on the server side, in the shared web app, it's looking for an rpc file with a path "forums/discussions" which is specific to the client module.  I can get things to work by copying these files to the shared web app, but that means I'll have to create copies of the .rpc files at different paths for every client that uses the shared service.  

Is there way way to avoid this by telling the servlet where to find the rpc files, or ... ?

thanks,
Rob

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