I also ran into this recently. My understanding is that the new RPC mechanism in GWT 2 (called deRPC or direct-eval RPC) is currently not compatible with GAE for a couple reasons (I worked around one, but stopped when I immediately ran into another). However, GWT 2 still supports the old-style RPC mechanism, and I was able to get GWT 2 and GAE to play nice together by going back to using that. This means using RemoteService and RemoteServlet (old-style) rather than RpcService and RpcServlet (new-style / deRPC).
Objectify is server-side only and should have nothing to do with RPC other than the fact that it doesn't get in the way of sending entity objects over GWT's RPC transports. It should work just fine once you the GWT deRPC / GAE conflict. Jamie On Wed, Mar 24, 2010 at 7:01 AM, laurent <[email protected]> wrote: > I'm trying to use GWT 2.0.3 together with GAE (using the Eclipse > plugin). > > I have got the following exception on the server whenever I want to > make a RPC call: > > Caused by: java.lang.RuntimeException: Unable to get Unsafe instance > at > > com.google.gwt.rpc.server.CommandSerializationUtil.<clinit>(CommandSerializationUtil.java: > 443) > ... 47 more > > I have found a couple of posts related to this problem: > > > http://groups.google.com/group/google-web-toolkit/browse_thread/thread/4af798cf1fc70ab9/fbf404e58ad9e86f?lnk=gst&q=Unable+to+get+Unsafe+instance#fbf404e58ad9e86f > > http://code.google.com/p/google-web-toolkit/issues/detail?id=4185 > > They seem to indicate that GWT 2.0 does not work with the current > version of GAE (1.3.1). That's surprised me a little bit ... > > So Objectify is not working with GWT 2.0 using the normal RPC > workflow ? > > Locally on dev mode, I have the following error: > 'java.lang.NoClassDefFoundError: java.net.InetAddress is a restricted > class. > > Does some of you manage a correct setting with GWT 2, Objectify 2 and > GAE 1.3 ? Am I missing something ? > > Thanks so much for your help. > > -- > You received this message because you are subscribed to the Google Groups > "Google Web Toolkit" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]<google-web-toolkit%[email protected]> > . > For more options, visit this group at > http://groups.google.com/group/google-web-toolkit?hl=en. > > -- You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.
