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/thread/75803bf6ae4eaeb7 > > 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 -~----------~----~----~----~------~----~------~--~---
