I have the following code in a servlet filter....

                GwtSessionTimeout timeout = new GwtSessionTimeout(
                                "Session timed out.  You need to redirect to 
the url in getUrl
function",
                                url);
                try {
                        String payload = 
RPCServletUtils.readContentAsUtf8(request, true);
                        RPCRequest rpcRequest = RPC.decodeRequest(payload);
                        payload = RPC.encodeResponseForFailure(null, timeout);

                        boolean gzipEncode = 
RPCServletUtils.acceptsGzipEncoding(request)
                                        && shouldCompressResponse(request, 
response, payload);

                        ServletContext servletContext = request.getSession
().getServletContext();
                        RPCServletUtils.writeResponse(servletContext, response, 
payload,
gzipEncode);

                } catch (SerializationException e) {
                        throw new RuntimeException("Exception", e);
                } catch (ServletException e) {
                        throw new RuntimeException("Exception",e);
                }

The browser(firefox) says "This application is out of date, please
click the refresh button on your browser."

If I change
payload = RPC.encodeResponseForFailure(null, timeout);
to
payload = RPC.encodeResponseForFailure(rpcRequest.getMethod, timeout);

it fails with UnexpectedException like GwtSessionTimeout was not a
RuntimeException, but it is a RuntimeException so it should work and I
expect the aysncCallback.onFailure to be called, but it doesn't work.

Here is my GwtSessionTimeout....
public class GwtSessionTimeout extends RuntimeException implements
IsSerializable{
}

why isn't this working?
later,
Dean



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