I have tried with DTO but i always have the following error : This application is out of date, please click the refresh button on your browser.
I have empty my cache, but the problem persists. Someone has an idea ? Thanks. On 6 mai, 12:51, Ouaibou <ouai...@gmail.com> wrote: > Okay, thanks Salvador, I will see that :o) > > On 6 mai, 11:17, Salvador Diaz <diaz.salva...@gmail.com> wrote: > > > > > Everybody seems to be missing this since app engine for java was > > released. Try reading the GWT Developer Guide guys, you'll find all > > kinds of interesting and useful stuff. > > > Anyway, the problem is that you can't use any > > org.datanucleus.store.appengine.* classes in your client-side code. > > You have to use the DTO pattern. > > > Here's one of the discussions related to this topic from a couple of > > days > > ago:http://groups.google.com/group/Google-Web-Toolkit/browse_thread/threa... > > > You could also try searching the forum, that'd keep us from answering > > the same question for the n-th time. > > > Hope that helps; > > > Salvador > > > PS: The relevant part of the developer documentation discussing this > > is > > here:http://code.google.com/webtoolkit/doc/1.6/DevGuideCodingBasics.html#D... > > > On May 6, 11:01 am, Paul Robinson <ukcue...@gmail.com> wrote: > > > > Your onFailure method ignores the Throwable it's given. Maybe it > > > contains something useful? > > > > Ouaibou wrote: > > > > Hello, > > > > > I have a problem with the callback of a RPC call. I have post in > > > > appengine forum because i think it was a problem with the appengine > > > > datastore, but Max Ross suggests me to post here : > > > > >http://groups.google.com/group/google-appengine-java/browse_thread/th... > > > > > In order to summarize : > > > > > I have two classes AudioFile and Genre. AudioFile as a field of type > > > > Genre. Both are marked as detachable like Max says me. I add an > > > > AudioFile in the datastore and then i do a RPC call in the client side > > > > in order to retrieve the data : > > > > > this.gtunesService.getAudioFiles(new AsyncCallback<List<AudioFile>>() > > > > { > > > > public void onFailure(Throwable caught) { > > > > SC.say(Gtunes.SERVER_ERROR); > > > > } > > > > public void onSuccess(List<AudioFile> result) > > > > { > > > > Gtunes.this.audioFiles = result; > > > > String buf = ""; > > > > for (AudioFile af : > > > > Gtunes.this.audioFiles) { > > > > buf += "genre = " + af.getGenre > > > > ().getName() + " - " > > > > + af.getName() > > > > + "<br />"; > > > > } > > > > SC.say(buf); > > > > } > > > > }); > > > > > The problem is in the server side with the following code : > > > > > public List<AudioFile> getAudioFiles() { > > > > List<AudioFile> audioFiles = null; > > > > PersistenceManager pm = PMF.get().getPersistenceManager(); > > > > > try { > > > > Query q = pm.newQuery(AudioFile.class); > > > > q.setOrdering("name"); > > > > audioFiles = new > > > > ArrayList<AudioFile>((List<AudioFile>) q.execute > > > > ()); > > > > pm.detachCopyAll(audioFiles); > > > > } finally { > > > > pm.close(); > > > > } > > > > > System.out.println("list = " + audioFiles); > > > > for (AudioFile audioFile : audioFiles) { > > > > System.out.println("name = " + audioFile.getName() + > > > > "\n"); > > > > } > > > > > return audioFiles; > > > > } > > > > > audioFiles contains my data. But the return has a problem because i > > > > enter in the onFailure in the client side but without any error. > > > > > However, i see that if i change the line : > > > > > audioFiles = new ArrayList<AudioFile>((List<AudioFile>) q.execute()); > > > > > for : > > > > > audioFiles = (List<AudioFile>) q.execute(); > > > > > I have get the following error : > > > > > 5 mai 2009 22:23:23 > > > > com.google.appengine.tools.development.ApiProxyLocalImpl log > > > > SEVERE: [1241555003875000] javax.servlet.ServletContext log: > > > > Exception > > > > while dispatching incoming RPC call > > > > com.google.gwt.user.client.rpc.SerializationException: Type > > > > 'org.datanucleus.store.appengine.query.StreamingQueryResult' was not > > > > included in the set of types which can be serialized by this > > > > SerializationPolicy or its Class object could not be loaded. For > > > > security purposes, this type will not be serialized. > > > > at > > > > com.google.gwt.user.server.rpc.impl.StandardSerializationPolicy.validateSer > > > > ialize > > > > (StandardSerializationPolicy.java:83) > > > > at > > > > com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.seriali > > > > ze > > > > (ServerSerializationStreamWriter.java:591) > > > > at > > > > com.google.gwt.user.client.rpc.impl.AbstractSerializationStreamWriter.write > > > > Object > > > > (AbstractSerializationStreamWriter.java:129) > > > > at > > > > com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter > > > > $ValueWriter$8.write(ServerSerializationStreamWriter.java:146) > > > > at > > > > com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.seriali > > > > zeValue > > > > (ServerSerializationStreamWriter.java:530) > > > > at com.google.gwt.user.server.rpc.RPC.encodeResponse(RPC.java: > > > > 573) > > > > at > > > > com.google.gwt.user.server.rpc.RPC.encodeResponseForSuccess > > > > (RPC.java:441) > > > > at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse > > > > (RPC.java:529) > > > > at > > > > com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall > > > > (RemoteServiceServlet.java:166) > > > > at com.google.gwt.user.server.rpc.RemoteServiceServlet.doPost > > > > (RemoteServiceServlet.java:86) > > > > at javax.servlet.http.HttpServlet.service(HttpServlet.java: > > > > 713) > > > > at javax.servlet.http.HttpServlet.service(HttpServlet.java: > > > > 806) > > > > at org.mortbay.jetty.servlet.ServletHolder.handle > > > > (ServletHolder.java: > > > > 487) > > > > at org.mortbay.jetty.servlet.ServletHandler > > > > $CachedChain.doFilter > > > > (ServletHandler.java:1093) > > > > at > > > > com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter > > > > (TransactionCleanupFilter.java:43) > > > > at org.mortbay.jetty.servlet.ServletHandler > > > > $CachedChain.doFilter > > > > (ServletHandler.java:1084) > > > > at org.mortbay.jetty.servlet.ServletHandler.handle > > > > (ServletHandler.java:360) > > > > at org.mortbay.jetty.security.SecurityHandler.handle > > > > (SecurityHandler.java:216) > > > > at org.mortbay.jetty.servlet.SessionHandler.handle > > > > (SessionHandler.java:181) > > > > at org.mortbay.jetty.handler.ContextHandler.handle > > > > (ContextHandler.java:712) > > > > at org.mortbay.jetty.webapp.WebAppContext.handle > > > > (WebAppContext.java: > > > > 405) > > > > at > > > > com.google.apphosting.utils.jetty.DevAppEngineWebAppContext.handle > > > > (DevAppEngineWebAppContext.java:54) > > > > at org.mortbay.jetty.handler.HandlerWrapper.handle > > > > (HandlerWrapper.java:139) > > > > at > > > > com.google.appengine.tools.development.JettyContainerService > > > > $ApiProxyHandler.handle(JettyContainerService.java:306) > > > > at org.mortbay.jetty.handler.HandlerWrapper.handle > > > > (HandlerWrapper.java:139) > > > > at org.mortbay.jetty.Server.handle(Server.java:313) > > > > at org.mortbay.jetty.HttpConnection.handleRequest > > > > (HttpConnection.java: > > > > 506) > > > > at org.mortbay.jetty.HttpConnection$RequestHandler.content > > > > (HttpConnection.java:844) > > > > at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java: > > > > 644) > > > > at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java: > > > > 211) > > > > at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java: > > > > 381) > > > > at org.mortbay.io.nio.SelectChannelEndPoint.run > > > > (SelectChannelEndPoint.java:396) > > > > at org.mortbay.thread.BoundedThreadPool$PoolThread.run > > > > (BoundedThreadPool.java:442) > > > > > I don't know where to see in order to debug. Does someone has an > > > > idea ? > > > > > Thanks. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group. To post to this group, send email to Google-Web-Toolkit@googlegroups.com To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/Google-Web-Toolkit?hl=en -~----------~----~----~----~------~----~------~--~---
